Product Description

NEEDLE VALVES (U SERIES) 4110-U

U Series Union Bonnet Valves have been engineered for use at pressures up to 6,000 psig (41.3 MPa) CWP at temperatures as high as 1,200 °F (649 °C). The design and materials of construction, coupled with end connections up to one inch make them perfect candidates for ASME B31.1 applications.

A metallic bonnet seal enhances the leak integrity of the valve throughout the pressure – temperature range. A non-rotating lower stem helps to extend packing life by removing rotation from the packing area. Stem packing below the threads isolates the thread lubricant from the flow, ensuring adequate lubrication regardless of the media.

The U Series Union Bonnet valves are supplied with either PTFE or flexible graphite packing and lower stem materials matched to the packing temperature capabilities.

Two stem types are available. A blunt B stem type is typically used for on-off control of media and the regulating R stem type is recommended for coarse regulation. Flow coefficients (C_v) range from 0.53 to 3.55.

A variety of US Customary and SI port connections, including CPI™ and A-LOK® compression, and female and male NPT are available